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3.
Your sexy ability. Can change depending on attitude, appearance, disposition, location.
Dude! Look at this new shirt. It easily adds 5 to my sexterity.
by Zanderif September 13, 2007
 
1.
Literally, sexual dexterity. Sexterity can be gained through sexual experience(s), or in some cases, pharmaceuticals.
"Man, getting with Nadine gave me mad sexterity!"

or;

"That Viagra really gave me the sexterity to go all night."
by Justin Herbert April 10, 2009
 
2.
The level of sexual skill and ability one has. Can be increased over time with experience or stat enhancing clothing.
Dude, check out my awesome wizard hat. It gives me +7 sexterity.
by The Chubububu October 11, 2009
 
4.
Remarkable ability to satisfy your partner's every sexual need using precision, knowledge, and agility.
Guy: How about we take this party to my place?
Girl: Boy, you best have some damn good sexterity if you wanna get down with me.
by mephix August 10, 2014